Impedance-based fault location analysis for transmission lines

Andrade, Luísa; Leão, Teresa Ponce de

doi:10.1109/tdc.2012.6281527

Cited by 14 publications

(10 citation statements)

References 22 publications

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“…This is to be expected since Dirichlet boundary conditions were imposed in the UV, and these respect the dual unitarity bounds. The issue of removing the bulk ghosts by introducing the appropriate cut-offs will be discussed in an upcoming publication [50].…”

Section: Discussionmentioning

confidence: 99%

Boundary conditions and unitarity: the Maxwell-Chern-Simons system in AdS3/CFT2

Andrade

Jottar

Leigh

2012

J. High Energ. Phys.

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We consider the holography of the Abelian Maxwell-Chern-Simons (MCS) system in Lorentzian three-dimensional asymptotically-AdS spacetimes, and discuss a broad class of boundary conditions consistent with conservation of the symplectic structure. As is well-known, the MCS theory contains a massive sector dual to a vector operator in the boundary theory, and a topological sector consisting of flat connections dual to U (1) chiral currents; the boundary conditions we examine include double-trace deformations in these two sectors, as well as a class of boundary conditions that mix the vector operators with the chiral currents. We carefully study the symplectic product of bulk modes and show that almost all such boundary conditions induce instabilities and/or ghost excitations, consistent with violations of unitarity bounds in the dual theory.

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Section: Discussionmentioning

confidence: 99%

Boundary conditions and unitarity: the Maxwell-Chern-Simons system in AdS3/CFT2

Andrade

Jottar

Leigh

2012

J. High Energ. Phys.

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“…This paper will be focused on travelling wave-based methods. This paper complements other work which contains a review of the impedance-based methods [3]. With both papers, a review of the current state of the art of fault locators is reached.…”

Section: Introductionmentioning

confidence: 75%

Travelling Wave Based Fault Location Analysis for Transmission Lines

Andrade

Leão

2012

EPJ Web of Conferences

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Abstract. This paper presents a review of the state of the art for fault location methods in transmission lines based on travelling waves. The motivations that led to these methods are explained historically. Also, a critical analysis, showing the advantages and disadvantages of each of them and their most common applications, is performed. Finally, a comparative analysis between two of the most widely used methods is carried out using real faults, in order to show the results' sensitivity to changes in the line parameters.

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“…The two-ended method gives the best performance, but the unsynchronized time-domain measurement from two terminals could lead to additional errors. Hence, the demand of GPS communication or synchronized measurements could be an important factor in utilizing such techniques [14].…”

Section: Results Summary and Discussionmentioning

confidence: 99%

Assessment of fault location techniques in voltage source converter based HVDC systems

Peng

Tzelepis

Glesk

2017

2017 IEEE Texas Power and Energy Conference (TPEC)

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This paper investigates fault location techniques in high voltage direct current (HVDC) transmission networks utilizing voltage source converters (VSCs). The subject has been extensively researched due to the fault locating actions associated with the supply restoration and the economic loss, and also because of the trending employment of VSC-HVDC transmission systems. However, the fast operation of HVDC protection has made fault localization more challenging as limited measurement data can be extracted. By broadly researching the existing fault locating approaches in such systems, a comprehensive literature review is presented. Then, two selected methods, active impedance method and travelling wave method (using Continuous Wavelet Transformation) are tested. These fault location techniques together with the power system models have been developed using Matlab/Simulink. The results are summarized and systematic comparative analysis of the two fault location techniques is performed

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Impedance-based fault location analysis for transmission lines

Cited by 14 publications

References 22 publications

Boundary conditions and unitarity: the Maxwell-Chern-Simons system in AdS3/CFT2

Boundary conditions and unitarity: the Maxwell-Chern-Simons system in AdS3/CFT2

Travelling Wave Based Fault Location Analysis for Transmission Lines

Assessment of fault location techniques in voltage source converter based HVDC systems

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